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<?php $json = '[{ "11111111": { "id": "val_somevalue5555", "customer": { "32312": { "name": "jane doe" } } }, "2222222": { "id": "val_somevalue25", "customer": { "32312234": { "name": "jane doe" } } } }]'; $jsonarr = json_decode($json, true); $newarr = []; foreach($jsonarr[0] as $key => $value) { $newarr[] = ['key' => $key, 'id' => $value['id']]; } var_dump($newarr);
Output for 5.6.38, 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
array(2) { [0]=> array(2) { ["key"]=> int(11111111) ["id"]=> string(17) "val_somevalue5555" } [1]=> array(2) { ["key"]=> int(2222222) ["id"]=> string(15) "val_somevalue25" } }

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